Digital Display, Relay & Component Testing, Voltmeter, Read the AVO meter, voltage, current& resistance, Circuit breaker protected., Bulit-in flashlight enables to work in the darK, Instantly identifies positive,negative&open circui, Test the bad ground contacts quickly,, Determine the positive, negative and open circuit, power injection, measuring, ground testing,, polarity checking, continuity testing, component activation., power injection, measuring, ground testing